Telegraph storage system



061:. 2, 1951 W, M, BACON y2,569,443

TELEGRAPH STORAGE SYSTEx Filed June 6, 1946 19 Sheets-Sme?l 1 ATTORNEY w. M. BACON 2,569,443

19 Sheets-Sheet 2 OctI 2, 1951 TELEGRAPH STORAGE `SYSTEM Filed June 6, 1946 ii ifi WEA/TOR big BACON ATTORNEY Oct 2, 1951 w. M. BACON TELEGRAPH STORAGE SYSTEM 19 Sheets-Sheet 3 Filed June 6, 1946 Www Ill

/A/ VEN TOR W, M. BACON W. M. BACON TELEGRAPH STORAGE SYSTEM Oct. 2, 1951 19 Sheets-Sheet 4 Filed June 6, 1946 j ATTORNEY W. M. BACON TELEGRAPH STORAGE SYSTEM oct. 2, 1951l 19 Sheets-Sheet 5 Filed June 6, 1946 /NVENTOR W M BA CON j /J AHORA/5r Oct. 2, 1951 w. M. BACON 2,569,443

TELEGRAPH STORAGE SYSTEM Filed June 6, 1946 19 Sheets-Sheet 6 /NVE/v TOR W M. BACON A7' TOR/VEV Oct. 2, 1951 w. M. BACON TELEGRAPH STORAGE SYSTEM Filed June 6, 1946 19 Sheets-Sheet '7 /N VEN TOR W M. BACON ATTORNEY Oct. 2, 1951 W, M BACON TELEGRAPH STORAGE SYSTEx Filed June e, 1946 19` Sheets-Sheet 8 /NVE/VTO WM BACON BV? W ATTORNEV Oct. 2, 1951 w. M. BAcoN TELEGRAPH STORAGE SYSTEM 19 Sheets-Sheet 9 Filed June 6, 1946 /NVE 7'0 W u 'AcN ATTORNEY BV j Oct. 2, 1951 w. M. BACON TELEGRAPH STORAGE SYSTEM 19 Sheets-Sheet lO Filed June 6, 1946 QS v #22 y @N5 mw ww ws .QMS hl MMG?) BV j ATTORNEY Oct. 2, 1951 w. M. BACON TELEGRAPH STORAGE sYsTE:

19 Sheets-Sheet 1l Filed June 6, 1946 /A/VE/VTOR B W M BACON y www j Arrow/5v Oct. 2, 1951 w. M. BAQON TELEGRAPH STORAGE YsufsTE:

19 *Sheets-Sheet 12 Fil'ed June 6, 1946 Rnd Nk.

/A/l/vron W M BACON www ATTORNEY Filed June 6. 1946 19 Sheets-Sheet 13 W M. BACUN @YZ/0 A AZTORNEV Oct. 2, 1951 w. M. BACON TELEGRAPH STORAGE SYSTEM 19 Sheets-Sheet 14 Filed June 6, 1946 vVl/avro@ j ATTORNEY NNN). ONS,

Oct. 2, 1951 w. M. BACON TELEGRAPH STORAGE SYSTEI 19 Sheets-Sheet l5 Filed June 6, 1946 /NvE/vroR W M BACON By j Arofafyf'r Oct. 2, 1951 w. M. BACON TELEGRAPH STORAGE sysml Filed June e, 1946 19 Sheets-Sheet 16 /N VEN TOR W M BACON B V 07 y ATTORNEY Oct. 2, 1951 W M BACON 2,569,443

TELEGRAPH STORAGE lSYSTEM Filed June e, 1946 19 sheets-sheet 17 /m/E/v-OR By W M BACON ATTORNEY Oct. 2, 1951 w. M. BACON ATELEGMPH STORAGE SYSTEM.

Filed June 6,"1'946 19 She ets-Sheet 19 /M/EA/ron W M. BACON '9k ATTORNEY Patented Oct. 2, 1951 UNITED- STATES PATENT FFI CE TELEGRAPH STORAGE SYSTEM Walter M. Bacon, New York, N. Y., assigner lto -Bell Telephone Laboratories, Incorporated, New

York, iN. Y., arcor-poration of N ew York Application Janet, 1946, serial No. ,674323 This invention relates to telegraph switching systems in which messages are stored `in 'switching oflices, and vmore particularly, Ato improvements in such systems-for thepurpose'of preventing or reducing temporary overloading *of 4outgoing lines or channels of transmissionwith certain classes of messages with resultant 'exclusion from those `lines of 'other messages lor classes 'of messages.

Arrangements according to the invention or 'involving the Vprinciples thereof 'may be embodied in different forms of system. 'In order to 'elucidate .the'principles of the invention and 'make 'manifest arrangements comprising exemplary embodiments thereof, it will 'first be necessary lto -summarize the 'principal features of 'a type 'of' existing system in 'which exemplary types of "the invention maybe incorporated.

In an existing type of .system a message storing and automatically operating message directing switching cnice is provided which may lbe connected by Atrunk lines to vother nidentical or similar oices. To the central Aswitching Voifrce there are connected a number Aof lines `orjchannelsy o'f `-transmission `which are usually duplexed, that "is, 'they may 'transmit in jboth directions simultaneously and m'ayutilizethe same wires for incoming 'and outgoing `'transmission 'or transmission over intermediate 'sections lbetween offices in accordance with 'well-known ltelegraph duplex practice, or they may use separate and oppositely directed paths of 'transmission-,two -of which, incoming and outgoing, are associated'together as `a duplex two-Way line. vThe `invention does not exclude half-duplex lines or channels which .are or may be used asV a part of the lines or .channels of such a system or as the -entirety thereof. 'At one or more outlying stations `o'f 'such a channel of transmission, which will 'often hereinafter 'for convenience be referred to as aline,there are provided telegraph transmitters usually oi the 'automatic type, or whichmay Abe'inanually operated, with associated teletypewriter or code receivers. The transmitters and receivers may be used together as a station or Vsogne stations may have transmitters only and Vothers .receivers only or some stations may have two different receivers, one of which may be provided With `multiple code forms and the other provided with 'means for producing a single copy only of 'the received message. Means are provided at the central switching o'filce whereby 'the outlying transmitters are assigned times or opportunities to transmit to the central loiice whereat the'incoming transmitted messages are recorded 'in areper'forator.

There may also 'besingle station lines connected to transmit into a similar reperforator in the central oiice 'and'there may also be originating stations inthe central oce consisting of a keyboard perforator into whiehymessage material may be recorded for 'transmission to one or more ofthe various outlying ofces ofthe system. Incoming messages recorded :bythe central cnice reperforators or recorded by `the l'keyboard perforators of the originating stations at the central office are self-directing. Usually each message begins with one or more letters shiftcode combinations, ythen an upper case in figures shift combination, followed by a combination which, in general, maybe used as an 'end-of-message message signal to clear out any false or erroneous connections accidently established through the system (if these be such) then one or more letters characters, then two code combinations comprising the address, followed 'by the message proper, followed by 'an kupper 'case code combination'used as an 'end-of-message'message signal. The two code combinations which comprise the address function coadjuv'antly .to select a path of transmission across the switching office from an automatic vtransmitter controlled 'by the stored Vmessage along 'withits address to a reperforator associated with an outgoing 'line 'or channel of transmission which, in'general, maybe anyone of the duplex lines 'or hali-duplex'l'ines referred vto previously. 'Each outgoing line in the exemplary type of system Yis provided with two reperforator-transmitter sets (there may 'be more) which are so arranged as to transmit their messages alternately one after `'the other, first a message from one transmitter then a message from the other transmitter so long as both are provided with messages to be transmitted. When only one is provided with 'such messages it Qproceeds to transmit messages one'aiter the other until its message .material vis exhausted or the other transmitter is provided with message material comprising one or more messages. Reperforators receivemessages lfrom the incoming line transmitters over one or another of two .types of paths. Paths of both of these types are selected by each two code combinations constituting .an address but the reperforators are connected to one or the other only and the vother ,reinainsfidle If the path connected is such 'as to lead to a reperforator associated with line connected to one or more outlying stations, .the first code combination, after it is used to select the path, is not transmitted over the used path but .is Aabsorbed .or dropped. The second code combination 'is transmitted over the path and appears in the outgoing- 

